Optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsNoriaki Iwaguchi, Haruki Okuyama, Takahisa Yamaguchi, Takashi Fujii
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Abstract
The optical fiber comprises a glass fiber comprising a core and a cladding, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer, wherein the primary resin layer contains a cured product of a resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and an aromatic acid compound, a content of the aromatic acid compound is 20 ppm or more and 12000 ppm or less based on a total amount of the resin composition, and Young's modulus of the primary resin layer is 0.6 MPa or less at 23° C.±2° C.
Claims7
An optical fiber comprising a glass fiber comprising a core and a cladding, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer,
- wherein the primary resin layer comprises a cured product of a resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and an aromatic acid compound,
- a content of the aromatic acid compound is 20 ppm or more and 12000 ppm or less based on a total amount of the resin composition,
- a Young's modulus of the primary resin layer is 0.6 MPa or less at 23° C.±2° C.,
- the resin composition contains the aromatic acid compound comprising two or more aromatic acid compounds, and
- the aromatic acid compound comprises diphenyl phosphinic acid and trimethylbenzoic acid.
Dependencies are inferred from the claim text.